I know that question is very general, but I want people to give me reasons why they think a certain class is the best. I have a 31 warden, a 32 lore master, and I just started a runekeeper. Sadly, these are the only characters I've ever played. From my experience (which probably isn't worth very much), it seems that many classes (burglar, captain, minstrel ect.) tend to be "squishier" than classes that can heal themselves, or regurally do. The runekeeper can provide damage and heal its fellows; the warden deals DoT and can also minorly heal itself, and the lore-master debuffs the heck out of its opponents. I am getting bored with these classes, specifically the lore master. Can someone please identify the next best class?

P.S. Please don't say it's all about my playing style. I like killing but not being killed.